Question

请帮助

这就是现在发生的事情...自定义图像我需要的是与默认facebook按钮的登录文本重叠，但我不想要在background.it中的默认登录文本也会自动记录-in ..如果我在应用程序中登录

Answer 1

可能对您有用。

FBLoginView *fbLoginView = [[FBLoginView alloc] initWithPermissions:[NSArray arrayWithObject:@"publish_actions"]];


    fbLoginView.frame = CGRectMake(0, 200, 271, 37);
     for (id obj in fbLoginView.subviews)
        {
            if ([obj isKindOfClass:[UIButton class]])
            {
                UIButton * loginButton =  obj;
                UIImage *loginImage = [UIImage imageNamed:@"YourImg.png"];
                [loginButton setBackgroundImage:loginImage forState:UIControlStateNormal];
                [loginButton setBackgroundImage:nil forState:UIControlStateSelected];
                [loginButton setBackgroundImage:nil forState:UIControlStateHighlighted];
                [loginButton sizeToFit];
            }
    }

Answer 2

自定义脸谱按钮，这是一种非常糟糕的做法，可以通过子视图进行迭代，以试图强制出一些不合意的东西，也就是说，制作自己的按钮并使用下面的方法实现图形API并不难，这些工作，他们提取数据，他们允许您自定义所有内容，他们为您的未来留下了一个非常好的方法，可以在任何应用程序中使用和自定义：

UIButton *_facebookButton = [UIButton buttonWithType:UIButtonTypeCustom];
[[_facebookButton layer] setCornerRadius:2.5];
[_facebookButton setTranslatesAutoresizingMaskIntoConstraints:FALSE];
[_facebookButton setTitle:@"Sign in with Facebook" forState:UIControlStateNormal];
[[_facebookButton titleLabel] setFont:[UIFont systemFontOfSize:15]];
[_facebookButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
[_facebookButton setBackgroundColor:[UIColor facebookBlue]];
[_facebookButton setTintColor:[UIColor whiteColor]];
[_facebookButton setImageEdgeInsets:UIEdgeInsetsMake(0, -135, 0, -2)];
[_facebookButton setImage:[UIImage imageNamed:@"facebookIconBlue"] forState:UIControlStateNormal];
[[_facebookButton layer] setMasksToBounds:TRUE];
[_facebookButton addTarget:self action:@selector(facebookButtonPressed) forControlEvents:UIControlEventTouchUpInside];
[self addSubview:_facebookButton];

处理登录的方法：

-(void)facebookButtonPressed {
    if(![FBSDKAccessToken currentAccessToken]) {
        FBSDKLoginManager *login = [[FBSDKLoginManager alloc] init];
        [login logInWithReadPermissions:@[@"email"] handler:^(FBSDKLoginManagerLoginResult *result, NSError *error){
             if (error)  {
                 //do work
             }
             else if (result.isCancelled) {
                 // do work
             }
             else
             {
                 if ([result.grantedPermissions containsObject:@"email"]) {
                     [self loadUserData];
                 }
             }
         }];
    }
    else {
        [self loadUserData];
    }
}

上面的方法然后将自己附加到此方法以从Facebook令牌中提取数据：

- (void)loadUserData {
    if([FBSDKAccessToken currentAccessToken]) {
         FBSDKGraphRequest *request = [[FBSDKGraphRequest alloc] initWithGraphPath:@"me" parameters:@{@"fields": @"id, name"}];
        [request startWithCompletionHandler:^(FBSDKGraphRequestConnection *connection, id result, NSError *error) {
             if (!error) {
                 NSDictionary *userData = (NSDictionary *)result;
                 NSString *facebookID = userData[@"id"];
                 NSString *link = userData[@"link"];
                 NSString *locale = userData[@"locale"];
                 NSString *timezone = userData[@"timezone"];
                 NSString *last_name = userData[@"last_name"];
                 NSString *email = userData[@"email"];
                 NSString *gender = userData[@"gender"];
                 NSString *first_name = userData[@"first_name"];

                 //**** THIS IS WHERE YOU PUSH YOUR VIEW CONTROLLER, THE USER IS NOW LOGGED IN AND YOU HAVE THE DATA YOU NEED TO RECORD ON YOUR SERVER BACKEND***
             }
             else if (error) {

             }
         }];
    }
    else if (![FBSDKAccessToken currentAccessToken]) {
    }
}

请务必记下上面的部分，表明您可以将用户视为“已通过身份验证”的位置。通过子视图迭代到达可以改变的视图是“OKAY”，但这根本不是好习惯。如果不喜欢Facebook登录按钮的外观，最好使用自己的自定义按钮。我希望这会对你有所帮助。

如何在ios中更改facebook按钮的默认图像

2 个答案: